Just 12 keys have access to one of New York City’s largest secret gardens — and one of them is up for grabs.

A for-sale Upper East Side townhouse boasts rarified entry to the elusive Jones Wood Garden — where only a handful of New Yorkers get to witness its changing fall foliage or blooming cherry blossoms.

A write-up by the New York Times in 1997 dubbed the garden “one of the last civilized spots in New York: a quiet, intimate green well surrounded by low buildings on all sides, a place where it is hard to calculate any improvement.”

The sunken garden is secreted away between Third and Lexington avenues, accessed by 12 homes lining East 65th and East 66th streets. After an unusual surge of deals since 2024, a single East 65th Street property is back on sale, The Post has learned — as

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